diff --git a/classes/pref/system.php b/classes/pref/system.php
index 89052c6e3..707869e3f 100644
--- a/classes/pref/system.php
+++ b/classes/pref/system.php
@@ -23,9 +23,75 @@ class Pref_System extends Handler_Protected {
 		$this->pdo->query("DELETE FROM ttrss_error_log");
 	}
 
+	private function log_viewer(int $page, int $severity) {
+		print "<table width='100%' cellspacing='10' class='prefErrorLog'>";
+
+		print "<tr class='title'>
+			<td width='5%'>".__("Error")."</td>
+			<td>".__("Filename")."</td>
+			<td>".__("Message")."</td>
+			<td width='5%'>".__("User")."</td>
+			<td width='5%'>".__("Date")."</td>
+			</tr>";
+
+		$errno_values = [];
+
+		switch ($severity) {
+			case E_USER_ERROR:
+				$errno_values = [ E_ERROR, E_USER_ERROR, E_PARSE ];
+				break;
+			case E_USER_WARNING:
+				$errno_values = [ E_ERROR, E_USER_ERROR, E_PARSE, E_WARNING, E_USER_WARNING, E_DEPRECATED, E_USER_DEPRECATED ];
+				break;
+		}
+
+		if (count($errno_values) > 0) {
+			$errno_qmarks = arr_qmarks($errno_values);
+			$errno_filter_qpart = "errno IN ($errno_qmarks)";
+		} else {
+			$errno_filter_qpart = "true";
+		}
+
+		$limit = 10;
+		$offset = $limit * $page;
+
+		$sth = $this->pdo->prepare("SELECT
+				errno, errstr, filename, lineno, created_at, login, context
+			FROM
+				ttrss_error_log LEFT JOIN ttrss_users ON (owner_uid = ttrss_users.id)
+			WHERE
+				$errno_filter_qpart
+			ORDER BY
+				ttrss_error_log.id DESC
+			LIMIT $limit OFFSET $offset");
+
+		$sth->execute($errno_values);
+
+		while ($line = $sth->fetch()) {
+			print "<tr>";
+
+			foreach ($line as $k => $v) {
+				$line[$k] = htmlspecialchars($v);
+			}
+
+			print "<td class='errno'>" . Logger::$errornames[$line["errno"]] . " (" . $line["errno"] . ")</td>";
+			print "<td class='filename'>" . $line["filename"] . ":" . $line["lineno"] . "</td>";
+			print "<td class='errstr'>" . $line["errstr"] . "<hr/>" . nl2br($line["context"]) . "</td>";
+			print "<td class='login'>" . $line["login"] . "</td>";
+
+			print "<td class='timestamp'>" .
+				TimeHelper::make_local_datetime($line["created_at"], false) . "</td>";
+
+			print "</tr>";
+		}
+
+		print "</table>";
+	}
+
 	function index() {
 
-		$severity = isset($_REQUEST["severity"]) ? (int) clean($_REQUEST["severity"]) : E_USER_WARNING;
+		$severity = (int) ($_REQUEST["severity"] ?? E_USER_WARNING);
+		$page = (int) ($_REQUEST["page"] ?? 0);
 
 		print "<div dojoType='dijit.layout.AccordionContainer' region='center'>";
 		print "<div dojoType='dijit.layout.AccordionPane' style='padding : 0'
@@ -38,10 +104,18 @@ class Pref_System extends Handler_Protected {
 			print "<div region='top' dojoType='fox.Toolbar'>";
 
 			print "<button dojoType='dijit.form.Button'
-				onclick='Helpers.updateEventLog()'>".__('Refresh')."</button>";
+				onclick='Helpers.EventLog.refresh()'>".__('Refresh')."</button>";
 
 			print "<button dojoType='dijit.form.Button'
-				onclick='Helpers.clearEventLog()'>".__('Clear')."</button>";
+				onclick='Helpers.EventLog.prevPage()'>".__('&lt;&lt;')."</button>";
+
+			print "<button dojoType='dijit.form.Button' disabled>".T_sprintf('Page %d', $page+1)."</button>";
+
+			print "<button dojoType='dijit.form.Button'
+				onclick='Helpers.EventLog.nextPage()'>".__('&gt;&gt;')."</button>";
+
+			print "<button dojoType='dijit.form.Button'
+				onclick='Helpers.EventLog.clear()'>".__('Clear')."</button>";
 
 			print "<div class='pull-right'>";
 
@@ -59,65 +133,8 @@ class Pref_System extends Handler_Protected {
 
 			print '<div style="padding : 0px" dojoType="dijit.layout.ContentPane" region="center">';
 
-			print "<table width='100%' cellspacing='10' class='prefErrorLog'>";
+			$this->log_viewer($page, $severity);
 
-			print "<tr class='title'>
-				<td width='5%'>".__("Error")."</td>
-				<td>".__("Filename")."</td>
-				<td>".__("Message")."</td>
-				<td width='5%'>".__("User")."</td>
-				<td width='5%'>".__("Date")."</td>
-				</tr>";
-
-			$errno_values = [];
-
-			switch ($severity) {
-				case E_USER_ERROR:
-					$errno_values = [ E_ERROR, E_USER_ERROR, E_PARSE ];
-					break;
-				case E_USER_WARNING:
-					$errno_values = [ E_ERROR, E_USER_ERROR, E_PARSE, E_WARNING, E_USER_WARNING, E_DEPRECATED, E_USER_DEPRECATED ];
-					break;
-			}
-
-			if (count($errno_values) > 0) {
-				$errno_qmarks = arr_qmarks($errno_values);
-				$errno_filter_qpart = "errno IN ($errno_qmarks)";
-			} else {
-				$errno_filter_qpart = "true";
-			}
-
-			$sth = $this->pdo->prepare("SELECT
-					errno, errstr, filename, lineno, created_at, login, context
-				FROM
-					ttrss_error_log LEFT JOIN ttrss_users ON (owner_uid = ttrss_users.id)
-				WHERE
-					$errno_filter_qpart
-				ORDER BY
-					ttrss_error_log.id DESC
-				LIMIT 100");
-
-			$sth->execute($errno_values);
-
-			while ($line = $sth->fetch()) {
-				print "<tr>";
-
-				foreach ($line as $k => $v) {
-					$line[$k] = htmlspecialchars($v);
-				}
-
-				print "<td class='errno'>" . Logger::$errornames[$line["errno"]] . " (" . $line["errno"] . ")</td>";
-				print "<td class='filename'>" . $line["filename"] . ":" . $line["lineno"] . "</td>";
-				print "<td class='errstr'>" . $line["errstr"] . "<hr/>" . nl2br($line["context"]) . "</td>";
-				print "<td class='login'>" . $line["login"] . "</td>";
-
-				print "<td class='timestamp'>" .
-					TimeHelper::make_local_datetime($line["created_at"], false) . "</td>";
-
-				print "</tr>";
-			}
-
-			print "</table>";
 		} else {
 			print_notice("Please set LOG_DESTINATION to 'sql' in config.php to enable database logging.");
 		}
diff --git a/classes/sanitizer.php b/classes/sanitizer.php
index 64b2edd36..9ca4200a5 100644
--- a/classes/sanitizer.php
+++ b/classes/sanitizer.php
@@ -54,7 +54,9 @@ class Sanitizer {
 	}
 
 	public static function sanitize($str, $force_remove_images = false, $owner = false, $site_url = false, $highlight_words = false, $article_id = false) {
-		if (!$owner) $owner = $_SESSION["uid"];
+
+		if (!$owner && isset($_SESSION["uid"]))
+			$owner = $_SESSION["uid"];
 
 		$res = trim($str); if (!$res) return '';
 
diff --git a/include/errorhandler.php b/include/errorhandler.php
index 16afcabcf..3643db98a 100644
--- a/include/errorhandler.php
+++ b/include/errorhandler.php
@@ -11,11 +11,11 @@ function format_backtrace($trace) {
 				if (is_array($e["args"])) {
 					foreach ($e["args"] as $a) {
 						if (is_object($a)) {
-							array_push($fmt_args, "[" . get_class($a) . "]");
+							array_push($fmt_args, "{" . get_class($a) . "}");
 						} else if (is_array($a)) {
-							array_push($fmt_args, "[" . truncate_string(json_encode($a), 128, "...")) . "]";
+							array_push($fmt_args, "[" . truncate_string(json_encode($a), 256, "...")) . "]";
 						} else {
-							array_push($fmt_args, $a);
+							array_push($fmt_args, truncate_string($a, 256, "..."));
 						}
 					}
 				}
diff --git a/js/PrefHelpers.js b/js/PrefHelpers.js
index 0780fb708..57dff2333 100644
--- a/js/PrefHelpers.js
+++ b/js/PrefHelpers.js
@@ -50,21 +50,37 @@ const	Helpers = {
 
 		return false;
 	},
-	updateEventLog: function() {
-		xhrPost("backend.php", { op: "pref-system", severity: dijit.byId("severity").attr('value') }, (transport) => {
-			dijit.byId('systemConfigTab').attr('content', transport.responseText);
-			Notify.close();
-		});
-	},
-	clearEventLog: function() {
-		if (confirm(__("Clear event log?"))) {
-
-			Notify.progress("Loading, please wait...");
-
-			xhrPost("backend.php", {op: "pref-system", method: "clearLog"}, () => {
-				this.updateEventLog();
+	EventLog: {
+		log_page: 0,
+		refresh: function() {
+			this.log_page = 0;
+			this.update();
+		},
+		update: function() {
+			xhrPost("backend.php", { op: "pref-system", severity: dijit.byId("severity").attr('value'), page: Helpers.EventLog.log_page }, (transport) => {
+				dijit.byId('systemConfigTab').attr('content', transport.responseText);
+				Notify.close();
 			});
-		}
+		},
+		nextPage: function()  {
+			this.log_page += 1;
+			this.update();
+		},
+		prevPage: function() {
+			if (this.log_page > 0) this.log_page -= 1;
+
+			this.update();
+		},
+		clear: function() {
+			if (confirm(__("Clear event log?"))) {
+
+				Notify.progress("Loading, please wait...");
+
+				xhrPost("backend.php", {op: "pref-system", method: "clearLog"}, () => {
+					Helpers.EventLog.refresh();
+				});
+			}
+		},
 	},
 	editProfiles: function() {